Error code:The number of elements in B and I must be the same

Hi

I want to store data i calculated into a vector and then plot the vector but the next error pops up: A(I) = B, the number of elements in B and I must be the same.

This is the code i am talking about:

for i=0:360/5

    mi_selectgroup(1)
    mi_moverotate(0,0,5*i)
    mi_analyze(0);
    mi_loadsolution();
    mo_seteditmode('contour')
    mo_selectpoint((BUDSPL+0.175)*cos(HoekRK1r),(BUDSPL+0.175)*sin(HoekRK1r))
    mo_selectpoint((BUDSPL+0.175)*cos(HoekPMr),(BUDSPL+0.175)*sin(HoekPMr))

    flux_spoel(i+1)=mo_lineintegral(0);

end

(the language of the code comes from a programm named FEMM so don't worry about not recognizing it)

the point is that flux_spoel(i+1) doesnt have the same size as mo_lineintegral(0) and the size is growing each time the loop is executed. Thats what matlab is grumpy about, since i am quite new to matlab i don't really know how to solve this problem.

I tried applying flux_spoel1(i+1,1:length(mo_lineintegral(0)) = mo_lineintegral(0);

as my tutor told me to write it like this, i think then the lengths are the same in the end then but matlab gives an error code: The expression to the left of the equals sign is not a valid target for an assignment.

I don't want to bug my tutor every 5seconds so i came here.

I would be very gratefull to get some help and even more gratefull if someone tried to explain the solution rather than just writing new code so i can do it myself the next time :)

Thx in advance